如何在本地运行评估（测试版，仅限 Python）

试用版

此功能仍处于测试阶段。

有时，在本地运行评估而不将任何结果上传到 LangSmith 会很有帮助。 例如，如果您正在快速迭代提示并希望在几个示例中对其进行冒烟测试，或者如果您正在验证 target 和 evaluator 函数是否定义正确，则可能不希望记录这些计算。

您可以通过使用 LangSmith Python SDK 并将upload_results=False自evaluate() / aevaluate().

这将完全像往常一样运行应用程序和计算器，并返回相同的输出，但不会将任何内容记录到 LangSmith 中。 这不仅包括实验结果，还包括应用程序和评估程序跟踪。

例

让我们看一个例子：

蟒

需要langsmith>=0.2.0.Example 还使用pandas.

from langsmith import Client

# 1. Create and/or select your dataset
ls_client = Client()
dataset = ls_client.clone_public_dataset(
    "https://smith.langchain.com/public/a63525f9-bdf2-4512-83e3-077dc9417f96/d"
)

# 2. Define an evaluator
def is_concise(outputs: dict, reference_outputs: dict) -> bool:
    return len(outputs["answer"]) < (3 * len(reference_outputs["answer"]))

# 3. Define the interface to your app
def chatbot(inputs: dict) -> dict:
    return {"answer": inputs["question"] + " is a good question. I don't know the answer."}

# 4. Run an evaluation
experiment = ls_client.evaluate(
    chatbot,
    data=dataset,
    evaluators=[is_concise],
    experiment_prefix="my-first-experiment",
    # 'upload_results' is the relevant arg.
    upload_results=False
)

# 5. Analyze results locally
results = list(experiment)

# Check if 'is_concise' returned False.
failed = [r for r in results if not r["evaluation_results"]["results"][0].score]

# Explore the failed inputs and outputs.
for r in failed:
    print(r["example"].inputs)
    print(r["run"].outputs)

# Explore the results as a Pandas DataFrame.
# Must have 'pandas' installed.
df = experiment.to_pandas()
df[["inputs.question", "outputs.answer", "reference.answer", "feedback.is_concise"]]

蟒

{'question': 'What is the largest mammal?'}
{'answer': "What is the largest mammal? is a good question. I don't know the answer."}

{'question': 'What do mammals and birds have in common?'}
{'answer': "What do mammals and birds have in common? is a good question. I don't know the answer."}

	inputs.question	输出.answer	参考.answer	feedback.is_concise
0	What is the largest mammal?	What is the largest mammal? is a good question. I don't know the answer.	The blue whale	False
1	What do mammals and birds have in common?	What do mammals and birds have in common? is a good question. I don't know the answer.	They are both warm-blooded	False